Ageing is a complex syndrome where due to certain factors some of the organs of the body slow down in their functions. Most of the scientists arbitrarily believe that up to 30 years most of the organs grow to its full form, size, shape and function.
A day beyond the age of 30 years, the individual is one day old similarly affecting different organs. All most all organs in the body have sufficient reserve, thus ageing is a very slow process. More over all the organs do not get involved at the same time. The variability of the involvement of different organs also differs.
As we notice in clinical practice there may be a situation that only one organ is involved. Depending upon the severity of the involvement of organ the symptoms and signs appear in an identifiable manner to make a provisional diagnosis of the disease which is confirmed through the investigations specific to that disease. But such situation of the disease of an organ is not ageing.
Because of the slow changes in the body due to ageing an individual whether a male or a female feels as under:
Some graphic representation below, of the changes in an Individual as he/she ages.